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Comment by Dr. Krishna Kumari Challa 6 minutes ago

Global surveys find carbon uptake in tropics overestimated

An international team of researchers has found plants in the tropics absorb much less carbon dioxide than previous modelling had suggested, which has implications for ecosystem management.
Global atmospheric CO₂ measurements combined with ocean and fossil-fuel flux estimates and aircraft data indicate tropical ecosystems absorb substantially less CO₂ than many models suggest and may be near carbon neutral. This reduces the estimated tropical land carbon sink and refines understanding of ecosystem contributions to the global carbon cycle.

Britton B. Stephens et al, Improved latitudinal carbon budgets from global airborne surveys, Proceedings of the National Academy of Sciences (2026). DOI: 10.1073/pnas.2523984123

Comment by Dr. Krishna Kumari Challa 22 minutes ago

The slower component was detected in both the 2017 and 2024 observations, suggesting it is a long-lived feature of the system. The faster component appeared only in the newer data, indicating it may be launched in short-lived episodes. "The detection of two distinct velocity components (∼0.1c and ∼0.3c) with different variability patterns suggests a complex, stratified outflow," the team writes.

The researchers explain that the observations are consistent with a layered wind structure predicted by theoretical models, in which a faster "spine" launched from the innermost regions of the accretion disk is surrounded by a slower "sheath" originating farther out.

Together, the two components eject around 21 and 24 solar masses of material per year, respectively. This ranks them among the most massive and powerful UFOs known. This is also the highest-redshift UFO detected from a non-lensed quasar to date.

Interestingly, despite their enormous power, the team found that the winds follow the same scaling relations observed in lower-redshift active galaxies. The team notes that future instruments, particularly the planned NewAthena X-ray observatory, will be able to identify such winds in distant quasars.

G. Lanzuisi et al, The WISSHFUL program: the highest redshift UFO discovered in a non-lensed QSO, arXiv (2026). DOI: 10.48550/arxiv.2606.05312

Part 2

Comment by Dr. Krishna Kumari Challa 23 minutes ago

Powerful UFO spotted blasting from a distant black hole

Astronomers have detected one of the most powerful ultra-fast outflows ever seen from a distant supermassive black hole. Using XMM-Newton and NuSTAR, a team studied a hyper-luminous quasar at cosmic noon and found two distinct wind components blasting away from the black hole, details of which are outlined in a paper submitted to the arXiv preprint server on June 3. The study has been submitted to the journal Astronomy & Astrophysics and is currently under minor revision.
Black holes consuming large amounts of material tend to lash out, driving powerful winds of gas outward from the vicinity of the accretion disk. These winds are known as ultra-fast outflows, or UFOs, when they exceed 10% of the speed of light. They are thought to be a key mechanism by which black holes regulate both their own growth and that of their host galaxies. By depositing energy into the surrounding gas, they heat it, slow star formation and can eventually quench the galaxy entirely. This kind of regulation is thought to typically take place during cosmic noon—roughly 1.6 to 3.5 billion years after the Big Bang—when both black holes and galaxies are growing at their peak rates.

UFOs leave their fingerprints in X-ray spectra as absorption features. They create dips caused by highly ionized iron in the outflowing gas absorbing X-rays as they travel toward us. Because the gas is moving outward at a significant fraction of the speed of light, these features appear shifted to higher energies than expected—a blueshift that reveals both the presence and the speed of the wind.

Most previous detections at high redshift relied on gravitationally lensed quasars—objects whose light is magnified by a foreground galaxy, boosting the luminosity. While useful, lensing can introduce some uncertainties.
In this new study, the team combined XMM-Newton and NuSTAR observations from October 2024 with an archival XMM-Newton observation from 2017 and produced a high-quality X-ray spectrum of WISSH13. It showed two clear absorption features. Modeling showed that these features arise from two different components of the same UFO, traveling at roughly 10% and 30% of the speed of light.
Part 1

Comment by Dr. Krishna Kumari Challa 20 hours ago

The mysterious tooth condition affecting millions of children
Molar incisor hypomineralisation (MIH) is a common developmental enamel defect affecting first permanent molars and often incisors, leading to weak, discolored, sensitive teeth unrelated to oral hygiene. Suspected contributors include early-life illness, antibiotics, perinatal complications, environmental factors, and genetic susceptibility. MIH cannot currently be prevented, so management focuses on fluoride, sealants, fillings, crowns, or extractions, plus aesthetic treatments in older patients. Improved diagnostic consistency and etiological research are needed to refine prevention and care.

original article.

Comment by Dr. Krishna Kumari Challa 20 hours ago

Killing cancer requires immune cells to infiltrate tumors' hostile microenvironment—sugar shields can help them break in

Tumors create a hostile microenvironment that impairs immune and CAR-T cell function, partly via altered surface glycans and inhibitory molecules such as galectin-3. Glycoengineering CAR-T cells to express a modified glycan “sugar coat” reduces galectin-3 binding, enhances T-cell survival and communication in tumors, and prolongs antitumor activity, emphasizing resilience and microenvironment adaptation over increased cytotoxic potency.

original article.

Comment by Dr. Krishna Kumari Challa 21 hours ago

New research suggests maternal asthma may heighten risk of retinopathy of prematurity
Maternal asthma was associated with approximately a twofold increase in risk of treatment-requiring retinopathy of prematurity in a cohort of 2,237 screened premature infants. The association appeared independent of established risk factors such as gestational age and birth weight. Findings support maternal asthma control during pregnancy as a potential strategy to reduce severe ROP risk.

Dallin Milner et al, The Clinical Association of Maternal Asthma and the Development of Retinopathy of Prematurity in Preterm Infants, Journal of VitreoRetinal Diseases (2026). DOI: 10.1177/24741264261421789

Comment by Dr. Krishna Kumari Challa 21 hours ago

People usually seek medical attention after experiencing worrisome symptoms, including hives, dizziness, difficulty breathing and swelling of the lips, throat, tongue or eyelids. Some people may only experience digestive issues, including diarrhea, stomach pain, vomiting and nausea.

Doctors diagnose the allergy based on results from a blood test, symptoms and other details reported by the patient, including whether they recall any recent bug bites.
The blood test detects the presence of alpha-gal antibodies, but not all patients with a positive result develop the condition. Sometimes the test can also be wrong.
Doctors generally advise patients to avoid beef, pork, lamb and other meats from mammals. Some people are still be able to consume dairy products from these animals, including milk, cheese and butter. Those with particularly severe reactions may need to avoid foods made with other animal byproducts such as gelatin, which is found in marshmallows and gummy bears.

One rare exception: meat from a small number of pigs that have been genetically modified to not produce alpha-gal. Approved for consumption by the Food and Drug Administration in 2020, the pigs are bred as part of an experimental effort to harvest animal organs for transplantation into humans. Deactivating the alpha-gal gene was a critical first step to make sure the human immune system wouldn't immediately reject the foreign organs. Meat from these so-called "GalSafe" pigs is available from a company called Amaroo Hills.

People with the syndrome may also have to avoid certain medical products and implants. For instance, many heart valves are made from cow or pig parts.

The allergy can fade away in some people after several years. Commins has seen that happen in about 15% to 20% of his patients. But it's critical to avoid new tick bites.
In 2024, the FDA approved an injectable drug called Xolair for a variety of food allergies, including alpha-gal syndrome. The drug doesn't reverse the condition but helps reduce severe allergic reactions after accidental exposure to meat.

Source: News agencies - AP

Part 2

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Comment by Dr. Krishna Kumari Challa 21 hours ago

Alpha-gal syndrome, the life-threatening meat allergy caused by tick bites

It's common knowledge that ticks can spread infections that cause serious illnesses, including Lyme disease. Now health officials are trying to raise awareness of a lesser-known problem: a life-threatening allergy to meat triggered by tick bites.

The problem, known as alpha-gal syndrome, was first linked to a particular species of ticks about 15 years ago. But cases are on the rise as more people report symptoms such as hives, diarrhea and itchiness after eating as little as a mouthful of meat and—in some cases—dairy. The allergy doesn't impact consumption of seafood or poultry. Chicken, turkey and eggs are all OK to eat.

For years, the standard treatment has involved avoiding foods that come from cows, pigs and lambs while carrying an epinephrine injector in case of medical emergency. But regulators recently approved the first drug for the condition, and more therapies may be on the way.

Unlike other tick-borne illnesses, such as Rocky Mountain spotted fever, alpha-gal syndrome isn't caused by a bacteria or a virus. Instead, it occurs when the human immune system triggers an allergic response to a type of sugar, known as alpha-gal.

Alpha-gal is found in the meat of most mammals, but not in humans or other primates. It's also found in the saliva of certain ticks.

When eaten, the sugar is normally harmless. But when ticks bite through the skin, they can introduce the sugar directly into the bloodstream. That triggers the development of antibodies—immune system proteins that fight off foreign invaders—that quickly learn to identify and attack alpha-gal sugar molecules.

It turns out that the skin is a fantastic way to make an allergic response.

If this all happened orally, and we were eating alpha-gal like we do with steaks or barbecue, then we wouldn't become allergic. People that develop the antibodies will often experience a strong allergic reaction a few hours after consuming meat or dairy. But it can take weeks or months for the problem to develop, with the severity of symptoms often increasing over time.

 Rising cases also reflect the expanding habitat range of the lone star tick, the primary source of the condition in the U.S. Moreover people are now more aware of the disease and symptoms.

Part 1

Comment by Dr. Krishna Kumari Challa 22 hours ago

Cooling ingredients in e-cigarettes may cause irregular heartbeat or cardiac arrest
Synthetic cooling agents WS-3 and WS-23 in nicotine e-cigarette aerosols altered heart rate variability and increased premature beats in mice, with WS-23 tripling arrhythmias versus nicotine alone. In human cardiomyocytes, coolants modified rhythm only under hormonal stress. Nicotine absorption was unchanged. Findings indicate coolant-dependent pro-arrhythmic cardiac effects, with uncertain long-term and human impacts.

Influence of Cooling Agents on the Arrhythmogenic and Autonomic Effects of Electronic Cigarettes in an in vivo Model, Circulation Arrhythmia and Electrophysiology (2026). DOI: 10.1161/CIRCEP.125.014253

Comment by Dr. Krishna Kumari Challa 22 hours ago

How you can stop your cat from bringing home unwelcome pathogens
Outdoor-roaming pet cats have 3–5 times higher odds of carrying zoonotic pathogens than indoor-only cats and similar odds to feral cats, with ~100 zoonoses detected, including rabies, Toxoplasma and Salmonella. Free-roaming cats transmit pathogens via hunting and fecal contamination of shared spaces. Restricting unsupervised roaming, using enclosures or leashes, and maintaining vaccination and parasite control reduce risks to humans, wildlife and cats.

original article.

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